I was poking around in Mada\$machine.dat and came across the following:
Unfortunately, searching the forum for "$Spindle" turned up a ton of results with just the word "spindle" and not really anything related to this specific system variable. There is also no reference to this in the Kuka System Variables manual, nor the System Integrator manual.
Does anyone have insight as to what this actually does? My intuition is that it could potentially tell the system the installed tool is symmetrical around the tool axis, thus allowing the motion planner to reach a given position at any orientation around tool X.
This would be a big help to me, since most of the machines I work with are milling and 3d printing robots